Thymolphthalein IND Grade Reagent
White or microstrip yellow needle crystals. It is soluble in ethanol and acetone, insoluble in water. It is soluble in sulfuric acid and then turns to red,in dilute alkali liquid then turns to blue. The melting point is about 253 ° C.
Acid-base indicator, the pH is 9.3 (colorless) ~ 10.5 (blue). Testing blood reagents.
Item of Analysis
pH discoloration domain
Solubility in ethanol
to pass test
Residue on ignition(as SO4),%
Not a hazardous substance or mixture.